Calendar-watch.



No. 650,826. Patented Juno 5, won.

E. A. GRESSON. A

CALENDAR WATfiH.

(Application filed m 14, 1896.

(No Model.)

UNITED STATES PATENT OFFICE.

EUSTACHE AUGUSTE CRESSON, OF PARlflFRANCE.

- CALEhlDAR-WATCH. 1..

SPECIFICATION forming part of Letters Patent No. 650,826, dated (Tune 5, 1900.

Application filed May 14, 1896. Serial No, 191,495. (No model.)

To ctZZ 1071 0121, it may concern.-

Be it known that I, EUSTACHE AUGUSTE CRESSON, of the city of Paris, France, have invented a Combined \Vatch and Perpetual Calendar, (for which I have obtained Letters Patent in France for fifteen years, dated June 17, 1895, No. 248,206; in Belgium for fifteen years, dated June 17, 1895, No. 116,111; in England for fourteen years, dated August 13, 1895, No. 15,245, and in Switzerland for fifteen years, dated August 13,1895, No. 11,020,) of which the following is a full, clear, and exact description.

My invention relates to a combined watch and perpetual calendar; and it consists, essentially, of a case containing the watchmovement and inclosed within a triple ring rotatable about the case and the members of the band and case bearing the various inscriptions of the perpetual calendar.

Reference is to be had to the accompanying drawings, forming part of this specification, wherein is represented a keyless watch combined with a perpetual calendar, the calendar being of the kind which forms the subject of previous Letters Patent of the'United States of America, No. 452,450.

Figure 1 is a face view of the combined watch and calendar, part of the band being broken away. Fig. 2 is an edge view of the watch, showing the revolving triple ring in vertical section taken through the axis of the pendant. Fig. 3 is a back view of the combined watch and calendar. Fig. 4 shows the band developed in the fiat and the numbers inscribed on its periphery.

The same letters denote like parts in all the figures.

My invention consists, essentially, of a watchcase Ct for the Watch-movement and inclosed within a calendar-case rotatable thereon, the three members of the calendar-case being a band Z) and bezels b b". The band bears upon its periphery the numbers by which to find the key whereby to ascertain the name of the first day of any year and car ries the pendant c and the push-piece d for setting the hands. The bezels 11 Nate adapted to be snapped upon the ring I) and are adapted to turn freely thereon when in place. Both of these bezels bear the names of the days of the week, the one in direct and the other in reverseorder, as shown in Figs. 1 and 3. The watchcase a bears upon the side corresponding to the watch-dial the days of the month and upon its opposite side, Fig. 3, the names of the months and the three numbers 20, 4.8,? 76, the use'of which will behereinafter explained. The 'pendant c, fixed to the band I), carries the winding-stem e, which is turned by the knobf and terminates in a key-socket g, the winding-stem being free to turn in the pendant and also to be moved 1ongitudinally in order that the key g may engage with the squared end h of the winding-post, which is within the case a, the longitudinal movement of the stem 6 being limited by shoulders. The push-piece d is pressed and norm ally maintained outward by a fiat spring '5. This spring is adapted to bear upon the hand-setting push-piece j, which projects but a slight distance from the case a, so as not to interfere with the rotary movement of the watchcase with relation to the calendar-case. Marks should be provided on the watchcase and revolving ring to enable the key 9 to be at once brought opposite the winding-post h, in which position the figure XII of the dial will be opposite the pendant, as usual; but the key g may be held inengagement with the winding-post h by means of a spring suitably arranged.

To use the calendar, the Winding-stem e is disengaged from the. winding-post h, so that the watchcase is free to revolve within the calendar-case formed by the parts I) b 19 This combined watch and perpetual calendar thus serves for indicating both the time and the day of the week corresponding to any day of the month.

In order to use the calendar, it is only nec-- essary, as described in my said former patent, in the case of normal years to place the name of the month opposite the name of the first day of the year and then to read ofi the name of the day, which will be found above the day of the month given. Thus to find the day of the week of the 13th of June, 1895, it being known that the first day of the year 1895 was Tuesday, turn the sections of the calendar case with relation to each otheruntil the section of the case a containing June is oppo site the section Tuesday on ring 5?, and I then find at the other side of the watch on the division of ring b 'opposite 13 the name Thursday.

In the case of leap-years the mode of use is slightly different, (except for the months of January and February,) the month selected being placed opposite the name of the second day of the year. Thus to find the day of the Week of the 7th of March, 1896, it being known that the first day of the year 1896 was Wednesday, the division of case a bearing the name March is placed opposite the division Thursday of'ring b and then at the other side find the division of ring b opposite the 17th day of the month, which bears the name Tuesday.

To find the name of the first day of any year in the nineteenth century, subtract from 1 the number formed by the two last or righthand figures of the year in question the greatest of the numbers (20, 4S, 76, found on the back of the Watchease,) which is less than the said 11 umber,and then find in the movable band Z) the number which corresponds to the remainder, and the day of the week which is found in the same division on one of the bezels will be the day sought. If the number form ed by the last two figures of the year. is below twenty, add eight and then proceed as above. As the band I) may be shifted relatively to the bezels b 11 the numbers 20, 4:8, 76 may be used beyond the present century.

It should be understood that the abovedescribed type of calendar is given merely by way of example and that any other combination may be used. Y

I claim- 1. In a combined calendar and stem-winding watch, the combination of a watch-movenally-movable winding-stem carried by said band, so that the stem can be engaged with and disengaged from the winding-post of the Winding mechanism, and a hand-setting stud movable 'with the watch-movement-contain- '2. In a combined perpetual calendar and stem-winding watch, the combination of a Watch-movemen t-containing case, a calendarcase rotatable around the watch-movementcontaining case, said calendar-case comprising a rotatable band with independently-rotatable bezels having indices thereon, the said band constituting the edge of the case and having indices which cooperate with the indices upon the bezels and upon the face and back of the watch-movement-containing case, a longitudinally-movable winding-stem carried by said band, said winding-stem being normally out of engagement with the Winding-post of the winding mechanism and adapted to be forced into operative engagement therewith, a hand-setting studcarried by and movable with the watch-movementconta'ining case and adapted to be actuated by a push-piece carried by the movable band, said push-piece being disconnected from the hand-setting stud and watch-movement-containing case, substantially as and for the purposes specified.

The foregoing specification of mycombined watch and perpetual calendar signed by me this 16th day of April, 1896.

EUS'lACl-IE AUGUSTE CRESSON.

Witnesses:

CLYDE SHROPSHIRE, MAURICE H. PIGNET. 

